I've responded to a similar post so if you've read it you can pass on by. This is my opinion, and my opinion only.
If David doesn't want to taste food, that's fine with me. But, if QVC believes he can continue presenting food items without tasting then it shouldn't be necessary for the other hosts to taste the food. I think QVC needs to stick to a standard, either the hosts must try the food or none of them need to. I really don't care if they taste anything anyway, my food purchases are never determined by their reactions after a bite. I don't believe it is necessary. In fact, many times it's over the top. I'm sure every person on this board knows a host will not try something they find awful and tell us how bad it is. I just do not fall for the eye rolling and the "happy dance".
Basically, if you feel it's okay for David to not taste, whether for health reasons or personal preference, all tasting could be eliminated. Otherwise, David should no longer do food shows. Again, in my opinion, when he doesn't try a dessert or a high-carb food, it comes across as it is not healthy (which it probably isn't) and can subconsciously, or consciously, discourage a person from buying.